Finding the Third Proportional to 3,971,833 and 8,485,870

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971,833 : 8,485,870 = 8,485,870 : x
2. Step 2: Convert to fraction form
   3,971,833/8,485,870 = 8,485,870/x
3. Step 3: Cross multiply
   3,971,833x = 8,485,870 × 8,485,870
4. Step 4: Simplify right side
   3,971,833x = 72,009,989,656,900
5. Step 5: Solve for x
   x = 72,009,989,656,900/3,971,833
6. Step 6: Final answer
   x = 18,130,165.51